Improvement in harrow attachments for plows



P. JACOBUS 80 13.3.. AMBROSE.

HARROW ATTACHMENT, FOB. news.

Patented Feb. 29, 1876.

Elm,

1 attachment removed from place.

' handles.

UNITED STATES PATENT OFFIGE.

PIERSON J AGOBUS AND DAVID R. AMBROSE, OF ROM'ULUS, NEW YORK,

SAID AMBROSE ASSIGNOR TO SAID JAOOBUS.

IMPROVEMENT IN HARROW ATTACHMENTS FOR PLOWS.

' Specification forming part of Letters Patent No. 174,251, datedFebruary 29, 1876 application filed March 16, 1875.

provement in Harrow Attachment for Flows;

and we do hereby declare that the following is a full, clear, and exactdescription of the construction and operation of the same, referencebeing bad to the accompanying drawing, in which-- i Figure 1 is a planof a plow, showing our improvement. Fig. 2 is a plan of the harrow Fig.3 is a rear elevation of the same. Figs. 4., 5, and6 are detail views.This invention is an improvement on that patented by us February 2,1875, N 0'. 159,416.

. It consists, first, in the construction of the hinged arm, whereby itmay be extended or shortened at pleasure; and, second, in thecombination, with the gripe and arm, of aremovable gage-blockfor-varying the height of the arm in turning the dead-furrow, all ashereinafter more fully described.

In general the construction is similar to that shown in our patentaforesaid. A is the hinged arm, attached to the gripe O by means of aneye, a, and screw-pin g.v The arm stands at a backward angle, and has aset of curved teeth, 0 c c, which cut and pulverize thefurrow as fast asit is turned. The attachmentis secured to the plow-handle, on the furrowside, atany desired height. The gripe O is constructed in two parts, 0'0, each of which has a bolt, b, passing up through a cross-head, e, andis secured by a nut. The cross-head rests on top of the plow-handle. Thebottom of the part O has an offset or shoulder, is, which rests againstthe bottom of the handle. It also has a bolt, m, which passes throughthe lower end of part 0 and on which screws a nut. The 'top of thecross-head c is provided with a series of serrated teeth, p n, and withthese engage corresponding teeth of a clamping-plate, r, on which reststhe nut of the bolt b. This construction of the gripe is such that thegripe can fit dilferent-sized'plow- It is adjustable vertically by meansof the screw-bolts b b and their nuts, and laterally by means of theclamping-plate r, and the screw-bolt m. To allow the lateral adjustmentof the clamping-plate r, a slot has to be formed in the cross-head, asshown in Fig. 2.

The arm A is-constructed with side flanges s s, and a longitudinal slot,u. On top or-bottom of the arm, and between the flanges, rests a slidingarm, A. The teeth a c c are attached to the sliding arm by passing upthrough the slot a. By loosening the nuts d d'd on top, this sliding armcan be adjusted out or in, and may be clamped fast in any position bytightening the nuts again. The object of this arrangement is not to makea longer arm, but to adjust the teeth a c with reference to the wing ofthe plow, so as to cut properly in line with the furrow.

We find, in different plows, that the handle on the furrow side is setin different distances from the extremity of the wing. Therefore, insome plows the inner tooth 0 will be brought inside and behind the wing,so that i it will not cut into the furrow at all, but will follow in thedead space, while in other cases the inner tooth will project out andout too far into the furrow. The use of the sliding bar enables us toadjust the teeth exactly in all plows to cut the furrow properly.

The gripe O is provided, on the furrow side, with a projecting stop, f.In this, and beneath the arm A, rests a gage-block, B. Thisblockconsists of a head, h, and a stem, 5. The gage-block serves to sustainthe arm and prevent it from falling too low. 7 It can be raised higher,tov elevate the bar, by placing washers under its head, being therebyadjustable. It rests loosely in the hole in the stop f, and is thereforereadily removable. In turning the dead furrow at the end of the land, itis removed, which allows the arm to fall lower. The object of this istoallow the plow to be turned at an angle, on the'land side, which isnecessary in guiding the plow, as it loses its fulcrum or resistance inthe dead furrow.

The device, constructed as above described, enables the work to be donewith great facility.

What we claim as new, is

1. The'combination, with the handle of the plow, of the hinged arm A,and sliding arm A, for the purpose of adjusting the teeth our names inthe presence of two subscribing relatively with the wing of the plow, asshown witnesses.

and described. PIERSON J AOOBUS.

2. The combination, with the arm A and DAVID R. AMBROSE. stop f, of theremovable gage-block B, as and' Witnesses: for the purpose specified. R.F. OSGOOD,

In witness whereof we have hereunto signed EDWIN B. SCOTT.

